I get it OP and I don’t know why people can’t just accept it. Not everyone likes the same things and if people insist that you’re boring or whatever for it, then they’re just not nice people.
For me, I hate being the centre of attention. It’s the main reason I didn’t want to get married, I knew even in a small registry office, there is still a degree of attention on you and couldn’t stand that.
There most likely are reasons rooted in childhood for me. My partner, friends and kids (now they’re older) know that but it’s no one else’s business.
When the kids were younger they wanted to know when mummy’s birthday was and make a fuss, so of course I went along with it for them. But now, they know to just let the day pass. A few years ago I asked for them to make a donation to an animal charity each year around my birthday instead, so that’s what they do. I thank my MIL for the card/gift she gives me and say I’ve had a lovely day when she asks because she refuses to understand I don’t want fuss. Every year, without fail, she tells my partner, her son, to do something special. And every year he says, no mum, that’s not what she wants. She’s annoying, but as I can just avoid her on my birthday, it’s easily dealt with. Birthdays are how I want now, not mentioned and just like any other day.
I am very happy to celebrate anyone else’s birthday and make a huge fuss of anyone who actually wants that. I love meals out for them and parties and weddings and hen dos.....as long as they’re not mine and I’m not centre of attention. My partner and kids are lovely and I have a wonderful group of friends who accept me, because they’re nice people. Not everyone is, as shown on this thread 😉